CODEWITHSUNDEEP
androidlistviewandroid-view
PEEHU GANDHI
PEEHU GANDHI

Reputation: 75

My ListView is not displayed properly - how to fix that?

My problem is that my listview just displays rectangle boxes with no options visible but when i click any item it displays list's text Below is my xml file:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">

<ListView

    android:id="@+id/lv"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_alignParentBottom="true"
    android:layout_alignParentEnd="true"
    android:layout_alignParentRight="true" />
</RelativeLayout>

below is my java file:

package com.example.mypc.contextmenuapp;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.*;
public class MainActivity extends AppCompatActivity {
ListView lv;
ArrayAdapter<String> adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    lv=(ListView) findViewById(R.id.lv);
    String []arr=getResources().getStringArray(R.array.myarray);
    adapter=new ArrayAdapter<String> 
   (getApplicationContext(),android.R.layout.simple_list_item_2
             ,android.R.id.text1,arr);
    lv.setAdapter(adapter);
}
}

enter image description here

Upvotes: 0

Views: 86

Answers (2)

Kaveri
Kaveri

Reputation: 1088

Change the line :-

adapter=new ArrayAdapter<String>(getApplicationContext(),android.R.layout.simple_list_item_2
         ,android.R.id.text1,arr);

to

adapter=new ArrayAdapter<String>(getApplicationContext(),android.R.layout.simple_list_item_1
         ,android.R.id.text1,arr);

Differnce is that simple_list_item_1 has a single textview while the simple_list_item_2 has two textviews inside a subclass of RelativeLayout.

Also the arrayadapter does not fill multiple textview instances . You need to override getView() for that.

This answer will make it more clear

Note: - Since the listView is already match_parent both width and height , there should be no need for align with bottom or end or right.

Try without specifying the textview resource id like:-

adapter=new ArrayAdapter<String>(getApplicationContext(),android.R.layout.simple_list_item_1
         ,arr)

Since without it , it uses the default textview for displaying each item. But if you want you own textview , create a layout with textview as the root view and set it id as above and refer it in the constructor with the textview resouceId.

But in your case you do not need it , so try using without it.

Hope this helps.

Upvotes: 1

Omid.N
Omid.N

Reputation: 874

In your image ,texts are very pallid. When you click one of them, the background of the item becomes dark and the white text appears. On the other hand if you want items with one textview ,you should use ArrayAdapter, otherwise you must extend ArrayAdapter class. Here is an example:

https://github.com/codepath/android_guides/wiki/Using-an-ArrayAdapter-with-ListView

Upvotes: 0

Related Questions